Top-roll saddle



April 5,1927. 1,623,688

- T. W. LAWTON TOP ROLL SADDLE Filed Nov 20. 1925 lnv e nTor. Thomas W. Lav/Ton Anya.

Pinto nter! Apr. 5 1927. I V UNITED STATES PATENT OFFICE.

THOMAS w. LAWTON, F 'rAuN'roN, MASSACHUSETTS;

' i i membe This invention relates to top roll saddles and has for its object to provide a novel top ll tween theback toproll and middle top roll without,- however, changing the amount of weight delivered to the front top roll, or may be embodied in acne-piece saddle, in which jcase the predetermined distribution of the iveight between the front top roll and rear 1 top roll Will'bemaintained, notwithstanding any adjustment of top; roll.

In order to give an understanding of the invention I have illustrated in the drawings some selected embodiments thereof Iwhich will now be described after which the novel features will be pointed out in the appended claims. p r l 3" Fig. 1 is a sectional view illustrating a top roll saddle embodying my invention;

Fig, 2 is a top viewof the front saddle r; Fig. 3 is ail-enlarged the bearing for the rear section on the line Fi 4 shows a 'difierent embodiment of the 'invention. -Referring first to Figs. 1 to 3 which show the'invention embodied in'a top roll of the 4 ;typ having a rear saddle member which rests on the rear and, center top rolls and a Tfront saddle member which; rests on the front topv roll and on the rear saddle mem- V fiber; 1, 2 and 3 indicating respectively the 4 front top roll, middle top roll and back top roll and 4, 5 and 6 indicating the. bottom -"i'olls'l' 7 is'a frame or stand in which the rolls are'journalled." I

#The front saddle member is indicated at p 8 and the rear Saddlemember at 9. 10 is a the stirrup which is hung on the front sad- I dlel'member and 11 is the usual weighted I lever which is supported by the stirrup and the front end of which is fulcrumed in the fulcrum member '12.

As related to thetype of top roll saddle TOP-ROLL SADDLE.

Application filed November 20, 1925. Serial No. 70,433.

shown in Fig. 1 Onefeatureof my present invention is a novel construction by which a predetermined portion of the weight on the stirrup 10is always delivered to the front top roll, the remaining portion of said weight being distributed in any desired pro-,

portions between the rear and middle top rolls. I p

The construction herein illustrated for accomplishing this comprises a differential screw member 13 which occupies a slot 0r opening 14. formed in the front saddle memher, said screw at its front end being pointed as shown at 15 and bearing a socket member formed in the front saddle 'member and at its rear end extending through and ,l

journaled in the bridgepiece 16 of the front saddle member. The screw is held from moving longitudinally in thefront saddle member by means of two pins 17 which are anchored in the sides 18 of the topsaddle member and the ends of which are engaged in an annular groove 19 formed in the screw. This differential screw is provided with two portions 20, 21 having screw threads of different pitch. The screw threaded portion i 1 20 of finer pitch extends through and has screw-threaded engagement with a rest 22 which is received between the two sides 18 [of the front saddle member and which extends above the latter, saidrest havinga concave seat 23 to receive the upper end of the stirrup 10. This rest .22 thus forms the bearing point of the stirrup on the top roll sad- .dle. The other screw-threaded portion 21,

which is of coarser pitch, is threaded through a bearing member 2a which extends below the top roll saddle and has; a fulcrum point 25 at its lower end which bears on the rear saddle member 9. The rear end of the screw is provided with a screw driver slot 26 by which the screw may be turned.

The screw threads are both right-handed screw threads so that when the screw is turned both the rest 22 and the bearing member 24 will travel in the same direction but owingto the difference in pitch between Merely for the sake of illustration let it be assumed that it is desired to have one-half the total weight on the stirrup distributed to the front top roll and the other half distributed to the rear saddle member. In this case the rest 22 will be situated midway hetween the bearing member and the point where the front saddle member rests on the front top roll and the pitch of the screw threads 21 on the portion will be twice that of the screw threads on the portion 20.

1Vith this construction, whenever the screw is turned both the rest 22 and the hearing member 2-t will be moved longitudinally of the screw but be-ause of the fact that the pitch of the screw portion 21 is twice that of the screw portion 20 the hearing memb r 24 will move twice as fast as the re t As a result the rest 22 will always be maintained midway between the bearing; member 2% and the point where the front saddle member rests on the fronttop roll. The turr -ng of the screw and the shifting of the rest and bearing member 21 does not. therefore. make any change in the distribution of the weight between the front top roll and the rear saddle member. The movement of the bearing member 24. however, varies the distribution of the weight between the hack and the middle top rolls.

I have referred above to a diti'erential screw having a two-to-one construction but so far as the invent-ion is concerned it might be three-to-one or any other desired ratio. In other words, the construction might he such that two-thirds of the weight would be distributed to the front top roll and onethird delivered to the rear saddle member and this one-third distributed between the rear and middle top rolls. llais would involve simply making the screw 13 with the proper pitch relation between the two parts 20 and 21.

The main feature of the invention resides in a construction by which a consta t weight may be maintained on the front top roll while varying the distrilmtion of the we between the rear and middle top rolls and while I have herein illustrated a diiierential screw for aecon'iplishinp this end 1. do not wish to be limited to this particular construction.

In order to pro ide greater latitude of movementl propose to employ an adjustable fulcrum member 12. If the fulcrum member were fixed in position the amount which the rest 22 could be adjusted without bring;- ing the stirrup into contact with one of the rolls would be limited because of the relatirely narrow space between the front and middle top roll. I have provided, therefore. an adjustable fulcrum 12 which permits the lever 11 and the lower end of the stirrup 10 to be adjusted as necessary to clear the stirrup from the rolls.

'the weighted lever 11 and lower end of the Thefulcrmn 12 is carried bya screwthreaded member 260wvhich is swivelled in the arms of a yoke 27 that in turn mounted on the screw-tln'eaded shank 28 that screws into the frame 29. The head of the screw 26 is provided with a screw driver;

slot 30 by which the screw may he turned. As the screw is turned the fulcrum 12 is moved longitudinally ot the screw and thus stirrup 10 may be shifted bodily toward-the front or the rear and into such a position that the stirrup will clear the rolls when-athe proper adjustment has been made in the top roll saddle to obtain the desired distribution of the weight.

In Fig. 1: l. have shown the invention as emhodied in a one-piece. saddle which rests on the front top roll and rear top roll only. In this embodiment the onepiece saddle'is shown at 31. it resting at its front end on the front top roll 1 as usual and havinp at its rear end a bearing member 32 resting on the rear top roll 1- \Vith this construction ta entire weight on the stirrup 10 distributed between the front top roll andrear top roll.

The saddle member 31 in Fig. carries the differential screw 13 having the two scrcw-tlneaded portions 20 and 21' as shown in Fig. 1. the portion 20 having"liner scre-w threads than the portion 21.

The screw-threaded portion 21 has screwthreaded engagement with the hearing member 32 and the screw-threaded -portion. 2() has screw-threaded engagement with the rest on which the support 10 is supported. In a one-piece top roll saddle such as shown in Fig. -'l the usual practice is to have the stirrup so positioned that a greater portion of the weight will he delivered to the front top roll than to the rear top roll. For instance. a common practice would ,he to have two-thirds of the weight onther stirri-tp delivered to the front. top roll and one-third 110 to the rear top roll. ith this invention this would be accomplished-l t arramriiug the rest 22 at a point one-thirdol the-distance between the front top roll and the rearlop I'Oll. 1',

In the drawing of cotton preparatory to spinning a different adjustn'ient or spacing of the top rolls relative to ear-h other is desirable. when acting on cottonwith-a short staple than when acting; on cotton with .a long-yer staple and it is. there fore. a con'u'i-ion practice to adjust the top rolls according-to the requirements for use. The device shown in Fig. 1 permits such adjustment :to bcmade without. however. changing the distribution of weight between thefront top roll and the rear top roll. In the: embodiment herein shown where two-thirds of the weight is to be on the front top roll and one-- third 011 the rear top roll the pitch of the 130 screw thread will be one-third of the pitch of the screw thread 21. I claim. 1. In atop roll saddle, the combination with a rear saddle member adapted to rest weight is applied to the middle and rear top rolls to vary the distribution of the weight on said toprolls without changing the amount of weight distributed to the front top'roll. v v

2.. In a top roll saddle, the combination with a rear saddle meml'ier adapted to rest on the rear and middle top rolls, of a. front saddle member adapted to rest at its end on the front top roll, a bearing member carried by the front saddle member and resting on the rear saddle member, and means to shift the bearing member relative to the rear saddle member while in operative contact therewith and without'changing the relative amounts of weight distributed to the front top roll and the rear saddle member.

3. In a top roll saddle device, the combination with front, middl and rear top rolls, of a top roll saddleresting on said top rolls, a weighted stirrup hung from the top roll saddle and applying weight thereto, and means operative whilethe weight is thus applied to vary the distribution of the weight between therear and middle top rolls without changing the weight delivered to the front top roll. 7 I

at. In atop roll saddle device, the combination with front, middle and rear top rolls, of a top roll saddle resting on said top rolls, aweighted stirrup hung from thetep roll saddle and applying weight thereto, and means operative while the weight isthus applied to vary the distribution of the weight was between two of said top rolls without changing the weight on the othertop roll.

.5. In a top roll saddle, the combination with a rear saddle member adapted to rest on the rear and middle top rolls. ofa front saddle member resting at one end on the front top roll, a bearing member carried by the front saddle member and resting on the rear saddle member, a seat member also carried by the front saddle member, a weighted stirrup hung from the seat member, and means for adjusting the bearing member so as to vary the distribution of the weight on the rear and middle top rolls and for simultaneously adjusting the seat mem-. berso as to maintain a constant distribution of the weight between the front top roll and the rear saddle member.

6. In a top roll saddle, the combination with a rear saddle member adapted to rest on the rear and middle top rolls, of a front saddle member resting on the front top,

roll, a difierential screw carried by the front saddle member and having two screwthreaded portions of different pitch, a hearing member having screw-threaded engagement with one screw-threaded portion and bearing on the rear saddle member, a rest' member having screw-threaded engage.- ment with the other screw-threaded portion, and. aweighted stirrup hung from said rest member.

7. In a top roll'saddle, the combination with a rear saddlemember adapted to rest on the rear and middle top rolls, of a front saddle member resting on the front top roll,

a differential screw carried by the front saddle member and having two screwthreaded portions of different pitch, a bearmg member having screw-threaded engagement with one screw-threaded portion and bearing on the rear saddle member, a rest member having screv-.*tlneaded engagement with the other screw-threaded portion, a stirrup hung from the rest member, a

weighted lever supported by said, stirrup, and a fulcrum for the lever ad]ustable in the direction of the length of the lever.

8. The combination with top rolls, of saddle member resting on the front top roll, a bearing member by which the rear of the saddle member is supported and through which a portion of the weight on the saddle roll is transmitted to the rear top roll, a

differential screw carried by the saddle memher and havin two screw-threaded Jortions of differentpitch, one of which has screwthreaded engagement with the bearing mem" her, a rest member having screwthreaded engagement with the other screw-threaded portion, and a stirrup hung from the rest member,

In testimony whereof, I have signed my name to this specification.

THOMAS IV. LAVVTQN. 

